--- title: 'Full-Stack Engineer (Experienced) at Ranger' canonical: 'https://feeny.ai/job/full-stack-engineer-experienced-ranger-denver-ktd1k7smvrc8' type: 'job' last_seen: '2026-09-10' --- # Full-Stack Engineer (Experienced) at Ranger - **Company:** Ranger - **Location:** Denver, CO - **Compensation:** $130k–$200k - **Work type:** hybrid - **Posted:** 2024-11-27 - **Last confirmed live:** 2026-09-10 - **Apply:** https://jobs.lever.co/ranger/24ee78dc-22f2-4fea-bb3f-45694e0e18de ## Job description Ranger, Revolutionizing Software Testing We’re building Ranger to change the status quo of QA. Our mission is to power testing for the world’s most ambitious engineering, product, and design teams so they can get back to building. How We’re Already Changing the Game: Intelligent Test Generation Leveraging advanced LLMs, we automatically generate reliable and efficient Playwright tests. Self-Healing Tests Our system proactively identifies and resolves flaky tests, ensuring consistent and reliable test suites. Improved failure insights Get automated failure reports with likely causes, and easy-to-follow steps to reproduce the issue. Some of the fastest growing companies in the world (Clay, Suno, Dust, and more) use Ranger. We also collaborated with OpenAI, which you can read about here. Join Our Team To accelerate our mission we’re incredibly excited to announce $8.9M in total funding over two rounds of funding led by XYZ and General Catalyst. Among the many other fantastic backers, they are joined by some of our earliest customers (Clay Co-founder Varun Anand, Suno Co-founder Martin Camacho, Dust Co-founder Stan Polu). Let’s fix the way software teams test their products. We’re embarking on an exciting journey and we hope you join us as Ranger leads the way. ## What we are looking for - Getting back on defense for each other: No one at Ranger works on an island. When someone needs to step out or gets overwhelmed, we reach out to help rather than look to blame. We always put the team above ourselves out of trust that our teammates would do the same. - Creative problem solving: we are an early stage start-up, everyone is expected to work together to solve problems even if it might not usually fall within your job description. - Pride in your work: it is still critical to be proud of the work you and your peers are producing. Our pride should stem from craftsmanship and the value it brings customers. Part of this is preferring code to be live over perfect and finding the right tradeoffs to get there. What we are looking for in the role - 6-10+ years of professional experience in software engineering. - Strong desire to lead, execute, and own their own projects. - Track record of learning new languages, technologies, and patterns on the job. - Comfortable working and reasoning across the stack - frontend, backend, and infrastructure. - Willingness to work a hybrid schedule with a minimum of 3 days in-office. What would set you apart - Experience at an early-stage startup - Experience with DOM parsing and manipulation - Familiarity with LLM APIs and experience using them in a production environment - Experience with any of our tech stack: Express+NodeJS, PostgreSQL, MongoDB, Playwright, FFmpeg, GCP ## What you should expect - An opportunity to influence company culture. We are just beginning to invest in our hybrid offices - we would look to partner with you to help establish our culture. - Technical leadership opportunities with an opportunity to drive green-field projects from infrastructure to frontend, ensuring its in our customers hands. - Trust, respect, and responsibility. We treat one another as the full people we are and trust one another to make decisions in consideration of ourselves, our teammates, and the company. Note: Applicants must be authorized to work for ANY employer in the U.S. We are unable to sponsor or take over sponsorship of an employment Visa at this time. ## About Ranger ## Company Overview - **One-liner**: Ranger is an AI-powered platform that automates software quality assurance through intelligent test generation, self-healing tests, and failure insights, enabling engineering teams to ship faster with confidence. - **Entity Type**: Private (early-stage; $8.9M total funding over two rounds led by XYZ and General Catalyst) - **Headquarters**: San Francisco, CA, USA (with a secondary hybrid office in Denver, CO) - **Founded**: Conflicting reports – one source lists 2004, but all job postings describe it as an early-stage startup; likely founded within the last few years (no exact year publicly stated). - **Founders**: Josh (last name not publicly disclosed; referenced as co-founder in the Founding Marketer job posting) ## Core Business - **Primary Industry**: Developer tools / Software Quality Assurance (QA) - **Target Customers**: B2B – ambitious engineering, product, and design teams at fast-growing companies (e.g., Clay, Suno, Dust, Fanatics, Amplitude) and enterprises - **Mission**: “Power testing for the world’s most ambitious engineering, product, and design teams so they can get back to building.” ## Products & Services - **Ranger AI Platform** (SaaS): Automatically generates reliable, efficient Playwright tests using advanced LLMs. Includes self-healing tests that proactively identify and resolve flaky tests, and improved failure insights with automated reports, likely causes, and reproduction steps. ## Market Standing - **Valuation**: Not publicly disclosed - **Key Metric**: $8.9M total funding raised over two rounds (led by XYZ and General Catalyst); angel investors include operators from Linear, Webflow, and OpenAI - **Notable Investors/Partners**: XYZ (lead), General Catalyst; collaboration with OpenAI cited in their research paper (o3-mini). Customers include Clay, Suno, Dust, Fanatics, Amplitude. - **Growth Signals**: Early-stage but experiencing “exploding” opportunity day over day; recently released a fully self-serve product; cited in OpenAI’s o3-mini research paper; teams shipping “at agent-speed” driving demand. ## Competitive Advantages - **Intelligent AI‑Native QA**: Leverages advanced LLMs for test generation and self-healing – differentiates from traditional test automation frameworks. - **Self-healing tests** reduce maintenance burden for engineering teams. - **Deep integrations with modern CI/CD and developer workflows** (Playwright, GitHub, etc.). - **Early customer traction** with high‑profile, fast‑growing tech companies. - **Founding team with strong network** (backed by top VCs and operators from Linear, Webflow, OpenAI). ## Strategic Focus - **Product‑Led Growth**: Building self‑serve developer resources (docs, demos, onboarding) to drive adoption without heavy sales. - **Developer Community & Content**: Creating technical content, case studies, and community engagement to become the go‑to QA platform for AI‑era development. - **Scaling the Engineering Team**: Hiring full‑stack engineers and a forward‑deployed test engineer to own customer testing journeys. - **First Marketer Hire**: Building a growth engine from scratch (organic content, SEO, sponsorships, paid campaigns). ## Why Work Here - **Culture**: Early‑stage startup with opportunity to influence company culture; hybrid work model (minimum 3 days in‑office in San Francisco or Denver); offices located in the Presidio (SF). - **Work Policy**: Hybrid (60% hybrid per available data); on‑site options in SF; remote not offered for most roles. - **Benefits**: Comprehensive medical, dental, vision; paid holidays; flexible PTO; stock options. - **Engineering Culture**: High agency, ownership of projects from infrastructure to frontend; green‑field projects; trust and respect emphasized; technical leadership opportunities. - **Note**: Must be authorized to work in the U.S.; no visa sponsorship currently offered. ## Sources 1. [jobs.lever.co – Full-Stack Engineer](https://jobs.lever.co/ranger/24ee78dc-22f2-4fea-bb3f-45694e0e18de?gh_src=General+Catalyst+job+board) 2. [jobs.lever.co – Founding Marketer](https://jobs.lever.co/ranger/78866ea5-850d-44e4-9808-982fe7e50936?gh_src=General+Catalyst+job+board) 3. [jobs.lever.co – Forward-Deployed Test Engineer](https://jobs.lever.co/ranger/38ef5184-0c8a-4980-836f-95e23e83ae7d) 4. [jobera.com – Ranger Careers](https://jobera.com/employer/ranger/) ## Other roles at Ranger - [Founding Marketer](https://feeny.ai/job/founding-marketer-ranger-san-francisco-ba3jp45wm8hy) — San Francisco, CA - [Full-Stack Engineer (Experienced)](https://feeny.ai/job/full-stack-engineer-experienced-ranger-san-francisco-5n676a977zzm) — San Francisco, CA